what the? Axe CP jumping in the air!

what the? Axe CP jumping in the air!
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what the? Axe CP jumping in the air! - 8/20/2007 3:51:46 PM

thestratcat

Posts: 1331
Joined: 5/7/2005
From: Dwight, IL, USA
Status: offline

I just did a rebuild on my CP, it flies fine, but as it's hovering, it seems to suddenly pick up head speed and jump straight up! It's probably only a 3 ft or so jump, but this could be bad... I have no idea what is happening, I replaced the motor yesterday and it's doing the same thing, does anyone have any idea?

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Post #: 1

RE: what the? Axe CP jumping in the air! - 8/20/2007 6:27:47 PM

123Splat

Posts: 413
Joined: 4/27/2007
From: Austin, TX, USA
Status: offline

Strat,
Just an Idea, but might you have the motor pinion too tight. Happened to me short while back after a hard touch down.

Good luck,
Splat

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It's not the takeoff or the flying, it's the landing and repairing, so I can takeoff and fly again...

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Post #: 2

RE: what the? Axe CP jumping in the air! - 8/20/2007 6:50:26 PM

thestratcat

Posts: 1331
Joined: 5/7/2005
From: Dwight, IL, USA
Status: offline

hmmmmmm

or maybe too loose? do you think?

(I'd go loose over tight, my mesh is very nice)

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"If guns cause crime, all of mine are defective" ~ Ted Nugent.

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Post #: 3

RE: what the? Axe CP jumping in the air! - 8/20/2007 10:27:40 PM

s_mcflurry

Posts: 230
Joined: 4/13/2007
From: Santa Ana, CA, USA
Status: offline

Mine's doing the same exact thing. This is actually the second time it's done this - the first was after my first crash. After some deliberation in these forums, someone suggested that it was a bad servo. I did notice that a servo was glitching and after replacing it everything was fine...

...until recently. I would throttle up to just over hovering, it would hover a foot off the ground and then it would zoom up a foot or too. And the symptoms were the same as the first time - sounded like the engine throttling up and a jump. I'm fortunate to be more experienced in my hovers now than I was then so I've been able to recover and land. What's different this time is I haven't crashed in a month or so. I'm not sure what the problem is yet, so I'll need to look it over.

So, in short, it may be a servo? I'm certainly going to look at all of mine.

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Post #: 4

RE: what the? Axe CP jumping in the air! - 8/21/2007 1:08:23 AM

TG1200

Posts: 5
Joined: 10/22/2006
From: Rochester, MA, USA
Status: offline

Im only a couple of days into flying my axe and that same surge you guys are explaining happend to me today.. I havent crashed yet but have had a few solid touch downs on the training gear. Would be nice to get the surge problem figured out before it bites me...

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Post #: 5

RE: what the? Axe CP jumping in the air! - 8/21/2007 4:06:22 AM

PilotLight

Posts: 870
Joined: 8/15/2003
From: Benton Harbor, MI, USA
Status: online

Strat,

So, did you go with the stock TX, or did you get the Futaba 7 to work?

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Post #: 6

RE: what the? Axe CP jumping in the air! - 8/21/2007 1:42:20 PM

thestratcat

Posts: 1331
Joined: 5/7/2005
From: Dwight, IL, USA
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Pilotlight, I finally got the futaba to work with it friday night. Everything is good with the exception of that launch thing (and gravity kicking in yesterday evening).

I'm thinking I'll look at the servos and replace bad ones...

< Message edited by thestratcat -- 8/21/2007 2:19:39 PM >

_____________________________

"If guns cause crime, all of mine are defective" ~ Ted Nugent.

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Post #: 7

RE: what the? Axe CP jumping in the air! - 8/21/2007 7:22:26 PM

PilotLight

Posts: 870
Joined: 8/15/2003
From: Benton Harbor, MI, USA
Status: online

How did you get the Futaba to work with it? What was wrong?

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Post #: 8

RE: what the? Axe CP jumping in the air! - 8/21/2007 8:30:32 PM

thestratcat

Posts: 1331
Joined: 5/7/2005
From: Dwight, IL, USA
Status: offline

quote:

ORIGINAL: PilotLight

How did you get the Futaba to work with it? What was wrong?

hell if I know...

I went home friday evening, took the entire CP apart, replaced bearings, main shaft, etc... I got everything going right mechanically and then put the electronics in and compared it to before, it worked totally perfect! I must've had a wire crossed, but I know for sure I checked them at least 3 times! aaarrrrggghhhh!!

_____________________________

"If guns cause crime, all of mine are defective" ~ Ted Nugent.

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Post #: 9

RE: what the? Axe CP jumping in the air! - 8/21/2007 9:56:46 PM

K94max

Posts: 67
Joined: 6/23/2007
From: Johnson City, TN, USA
Status: offline

well, I would offer to help but seeing as how mine is in the shop for repairs (Hobbico) for the same symptoms as you describe (only mine went down instead of up) I can't tell you anything. Starting my second week now

, No Axe - no fly. I will post what I find out about mine but I know that is of no help to you for now.
In the meantime, I am shopping for another heli. Looking to go to a 500 size.

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Flying is for the Birds / Flying heli's is for the Nuts
Heli-Max Axe CP

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Post #: 10

RE: what the? Axe CP jumping in the air! - 8/21/2007 10:01:43 PM

PilotLight

Posts: 870
Joined: 8/15/2003
From: Benton Harbor, MI, USA
Status: online

Could be a bad servo, sticky swashplate, the main shaft might not be held securely in place by the wheel collar, radio glitch, vibration, or dirty potentiometer in the Transmitter.

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Post #: 11

RE: what the? Axe CP jumping in the air! - 8/21/2007 10:15:50 PM

thestratcat

Posts: 1331
Joined: 5/7/2005
From: Dwight, IL, USA
Status: offline

quote:

ORIGINAL: PilotLight

Could be a bad servo, sticky swashplate, the main shaft might not be held securely in place by the wheel collar, radio glitch, vibration, or dirty potentiometer in the Transmitter.

that's what I'm going after now.. I changed the motor, but that didn't do it.... so we're back to the drawing board...

after the crash I had last night with it, she'll be under repairs for a few days (I may just wait till the brushless motor comes in)..

K94max - check out the MX400.. they are very cool once it's set up and flying.. much nicer to fly than the CP (sorry guys, but it is)
oh yeah, and I went through the same deal on my CP, I went and bought a new one, flew it a bit, the other came back (which had the gyro on it) I used the second one I picked up as a parts heli...

_____________________________

"If guns cause crime, all of mine are defective" ~ Ted Nugent.

(in reply to PilotLight)

Post #: 12

RE: what the? Axe CP jumping in the air! - 8/22/2007 3:53:02 AM

alienteabagger

Posts: 327
Joined: 2/28/2007
From: miami, FL, USA
Status: offline

quote:

ORIGINAL: thestratcat

quote:

ORIGINAL: PilotLight

Could be a bad servo, sticky swashplate, the main shaft might not be held securely in place by the wheel collar, radio glitch, vibration, or dirty potentiometer in the Transmitter.

that's what I'm going after now.. I changed the motor, but that didn't do it.... so we're back to the drawing board...

after the crash I had last night with it, she'll be under repairs for a few days (I may just wait till the brushless motor comes in)..

K94max - check out the MX400.. they are very cool once it's set up and flying.. much nicer to fly than the CP (sorry guys, but it is)
oh yeah, and I went through the same deal on my CP, I went and bought a new one, flew it a bit, the other came back (which had the gyro on it) I used the second one I picked up as a parts heli...

Instead of going into an MX400 why no get a CopterX, Diablo, or Phoenix 450 (they are all T-Rex clones). The pricing on some of these are insanely low!

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Zit: T-Rex450SA Tiny: Thunder Tiger Raptor 50
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Post #: 13

RE: what the? Axe CP jumping in the air! - 8/22/2007 10:38:07 PM

K94max

Posts: 67
Joined: 6/23/2007
From: Johnson City, TN, USA
Status: offline

Thx for advice on heli's. I am currently really looking hard at the Hurricane 550. I want something I can use for scale and the Hurricane has got some good talk about it. Since this is the Helimax thread I don't want to say too much about it.
I checked my Axe's status and it was shipped for return to me today.

I hope Hobbico doesn't mind me doing this but based on the repair invoice they are sending me a new helicopter. Ain't bad customer service if that be the case. Of course, they probably took pity on me considering how banged up my bird was when I sent it to them. Still yet, got repairs free of charge minus my cost to ship and looks like it will be a new bird.

_____________________________

Flying is for the Birds / Flying heli's is for the Nuts
Heli-Max Axe CP

(in reply to alienteabagger)